High Tider or "Hoi Toider" is a dialect of American English spoken in very limited communities of the South Atlantic United States—particularly, several small island and coastal townships of the rural North Carolina "Down East" seaside region that encompasses the Outer Banks and Pamlico Sound (specifically including Atlantic, Sea Level, and Harkers Island in eastern Carteret County, and also Ocracoke) as well as of the Chesapeake Bay (such as Tangier and Smith Island). The term is also a local nickname for any native resident of these regions.
This dialect does not have one name uniformly used in the academic literature, but is referenced by a variety of names, including Hoi Toider (or, more restrictively based on region, Down East, Chesapeake Bay, or Outer Banks) English, dialect, brogue, or accent. The Atlas of North American English does not consider High Tider English to be a subset of Southern English (due to not participating in the first stage of the Southern Vowel Shift), but it shares commonalities as a full member of the Southeastern super-dialect region (in fronting the /oʊ/ and /aʊ/ vowels, exhibiting the pin–pen merger, resisting the cot–caught merger, and being strongly rhotic).